"Apcupsd can be used for power mangement and controlling most of APC's UPS models on Unix and Windows machines. Apcupsd works with most of APC's Smart-UPS models as well as most simple signalling models such a Back-UPS, and BackUPS-Office. During a power failure, apcupsd will inform the users about the power failure and that a shutdown may occur. If power is not restored, a system shutdown will follow when the battery is exhausted, a timeout (seconds) expires, or runtime expires based on internal APC calculations determined by power consumption rates. Apcupsd is licensed under the GPL version 2." [http://www.apcupsd.org/]

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==Installation==

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First, emerge {{Package|sys-power/acpupsd}}:

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<console>

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###i## emerge apcupsd

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###i## equery f apcupsd

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</console>

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==Configuration and Runlevel Registration==

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Edit your <tt>/etc/apcupsd/apcupsd.conf</tt> properly.

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To start <tt>apcupsd</tt>, run the following:

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<console>

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###i## /etc/init.d/apcupsd start

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</console>

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To add <tt>apcupsd</tt> to the appropriate runlevels, execute the following commands:

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<console>

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###i## rc-update add apcupsd default

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* service apcupsd added to runlevel default

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###i## rc-update add apcupsd.powerfail shutdown

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* service apcupsd added to runlevel shutdown

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</console>

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==Check UPS status==

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Finally, to check on the status of <tt>acpupsd</tt>, run the following: